C09K15/00	Anti-oxidant compositions; Compositions inhibiting chemical change
	Note(s) In groups C09K 15/02-C09K 15/34, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, a composition is classified in the last appropriate place. [2]In groups C09K 15/02-C09K 15/34, a metal salt of an organic compound is classified as that compound.